diff options
Diffstat (limited to 'RemovePath.hs')
-rw-r--r-- | RemovePath.hs | 80 |
1 files changed, 0 insertions, 80 deletions
diff --git a/RemovePath.hs b/RemovePath.hs deleted file mode 100644 index 2e8fd01..0000000 --- a/RemovePath.hs +++ /dev/null @@ -1,80 +0,0 @@ -{- - - Copyright 2015 Egor Tensin <Egor.Tensin@gmail.com> - - This file is licensed under the terms of the MIT License. - - See LICENSE.txt for details. --} - -module Main ( main ) where - -import Control.Monad ( when ) -import System.Console.GetOpt -import System.Environment ( getArgs, getProgName ) -import System.Exit ( exitFailure, exitSuccess ) -import System.IO ( hPutStr, stderr ) - -import qualified EnvUtils - -main :: IO () -main = do - rawArgs <- getArgs - case getOpt Permute optionDescription rawArgs of - (actions, args, []) -> do - options <- foldl (>>=) (return defaultOptions) actions - removePath args options - (_, _, errorMessages) -> exitWithUsageErrors errorMessages - -removePath :: [String] -> Options -> IO () -removePath paths options = do - let varName = name options - userVal <- EnvUtils.queryFromRegistry EnvUtils.CurrentUserEnvironment varName - let userValParts = EnvUtils.splitPaths userVal - let newUserValParts = filter (`notElem` paths) userValParts - when (length userValParts /= length newUserValParts) $ do - EnvUtils.saveToRegistryWithPrompt EnvUtils.CurrentUserEnvironment varName $ EnvUtils.joinPaths newUserValParts - when (global options) $ do - globalVal <- EnvUtils.queryFromRegistry EnvUtils.AllUsersEnvironment varName - let globalValParts = EnvUtils.splitPaths globalVal - let newGlobalValParts = filter (`notElem` paths) globalValParts - when (length globalValParts /= length newGlobalValParts) $ do - EnvUtils.saveToRegistryWithPrompt EnvUtils.AllUsersEnvironment varName $ EnvUtils.joinPaths newGlobalValParts - -data Options = Options { name :: String - , global :: Bool } - deriving (Eq, Show) - -defaultOptions :: Options -defaultOptions = Options { name = "PATH" - , global = False } - -buildHelpMessage :: IO String -buildHelpMessage = do - header <- buildHeader - return $ usageInfo header optionDescription - where - buildHeader :: IO String - buildHeader = do - progName <- getProgName - return $ "Usage: " ++ progName ++ " [OPTIONS...] [PATH...]\nOptions:" - -exitWithHelpMessage :: a -> IO b -exitWithHelpMessage _ = do - helpMessage <- buildHelpMessage - putStr helpMessage - exitSuccess - -exitWithUsageErrors :: [String] -> IO a -exitWithUsageErrors errorMessages = do - hPutStr stderr $ concatMap ("Usage error: " ++) errorMessages - helpMessage <- buildHelpMessage - hPutStr stderr helpMessage - exitFailure - -invalidNumberOfArguments :: IO a -invalidNumberOfArguments = exitWithUsageErrors ["invalid number of arguments\n"] - -optionDescription :: [OptDescr (Options -> IO Options)] -optionDescription = [ - Option "n" ["name"] (ReqArg (\s opts -> return opts { name = s }) "NAME") "set the variable name ('PATH' by default)", - Option "g" ["global"] (NoArg $ \opts -> return opts { global = True }) "remove the path for all users", - Option "h" ["help"] (NoArg exitWithHelpMessage) "show this message and exit" - ] |